CN221195161U - Exhaust silencer - Google Patents

Abstract

The utility model discloses an exhaust silencer, which comprises an inner shell and an outer shell, wherein an air inlet pipe is arranged at one end of the outer shell, an exhaust pipe is arranged at the other end of the outer shell, the air inlet pipe and the exhaust pipe are both communicated with the inside of the inner shell, a front partition plate is arranged in the inner shell and is close to the air inlet pipe, and a first silencing chamber is formed between the front partition plate and the inner shell; the middle position of preceding baffle is provided with first communicating pipe, one side of preceding baffle is provided with two at least perforated plates, leaves the clearance between the perforated plates and fills and have the amortization material to form the amortization module of establishing ties, be provided with two at least second communicating pipes on the perforated plate, preceding baffle, perforated plate and inner shell constitution second amortization room, this exhaust silencer can weaken the noise by a wide margin through multiple noise elimination mode for exhaust noise accords with the requirement, has improved the amortization performance of exhauster greatly.

Description

Exhaust silencer

Technical Field

The utility model relates to the technical field of noise reduction, in particular to an exhaust silencer.

Background

Along with the improvement of the living standard of people, noise has become a serious hazard affecting the health of people. In which exhaust noise of an engine is one of the main sources of pollution of noise, and thus the exhaust noise must be controlled.

At present, when engine noise test is carried out, most of the existing silencing devices adopt silencing materials such as silencing cotton to absorb noise, but only a part of noise can be eliminated only through a mode of singly absorbing the noise, and the discharged noise still cannot meet the requirements.

Disclosure of Invention

The utility model aims to overcome the existing defects, and provides the exhaust silencer which can greatly weaken noise in various silencing modes, so that the discharged noise meets the requirements and can effectively solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the exhaust silencer comprises an inner shell and an outer shell, wherein an air inlet pipe is arranged at one end of the outer shell, an exhaust pipe is arranged at the other end of the outer shell, the air inlet pipe and the exhaust pipe are both communicated with the inside of the inner shell, a front partition plate is arranged in the inner shell and close to the air inlet pipe, and a first silencing chamber is formed between the front partition plate and the inner shell;

The middle position of the front partition plate is provided with a first communicating pipe, one side of the front partition plate is provided with at least two porous plates, a gap is reserved between the porous plates, and silencing materials are filled in the porous plates to form a silencing module connected in series, the porous plates are provided with at least two second communicating pipes, the front partition plate, the porous plates and the inner shell form a second silencing chamber, and the first communicating pipe and the second communicating pipe are both positioned in the second silencing chamber;

One side of the porous plate is provided with a rear baffle, the exhaust pipe is fixed at the middle position of the rear baffle, a gap is reserved between the rear baffle and the inner shell and filled with a silencing material, and a third silencing chamber is formed among the porous plate, the rear baffle and the inner shell.

As a preferable embodiment of the present utility model, a heat insulating material is filled between the inner shell and the outer shell.

As a preferable technical scheme of the utility model, the air inlet pipe and the air outlet pipe are respectively provided with an air inlet flange and an air outlet flange.

As a preferable technical scheme of the utility model, the front partition plate is connected with the first communicating pipe, the porous plate is connected with the second communicating pipe, the rear partition plate is connected with the exhaust pipe in a welding mode.

As a preferable technical scheme of the utility model, two brackets are symmetrically arranged at the lower end of the shell, and a fixing plate is arranged at the lower end of each bracket.

Compared with the prior art, the utility model has the beneficial effects that: the exhaust silencer divides the inner shell into a first silencing chamber, a second silencing chamber and a third silencing chamber by arranging a front baffle plate, a porous plate and a rear baffle plate in the inner shell, wherein a first communicating pipe is arranged on the front baffle plate to reduce noise and enable air flow to pass through, and then the air flow is divided into a plurality of branch flows by a plurality of second communicating pipes on the porous plate and is dispersed, resisted, reflected and filtered along a curved surface, so that the noise is greatly reduced; the hole on the cooperation perforated plate makes the sound wave rub in the hole and turn into heat energy consumption, and then the secondary amortization, finally absorbs the noise through the amortization material that fills between the perforated plate and between back baffle and the inner shell, through the amortization of three kinds of modes, only very little noise can discharge, accords with the amortization requirement.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

In the figure: 1 inner shell, 2 outer shell, 3 first amortization room, 4 front baffle, 5 heat insulating material, 6 first communicating pipe, 7 second amortization room, 8 second communicating pipe, 9 perforated plate, 10 amortization module, 11 third amortization room, 12 rear baffle, 13 blast pipe, 14 exhaust flange, 15 support, 16 fixed plate, 17 air inlet flange, 18 intake pipe.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments (for convenience of description and understanding, the following description is given with the upper side of fig. 1 as the upper side). All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, the present utility model provides a technical solution: the exhaust silencer comprises an inner shell 1 and an outer shell 2, wherein an air inlet pipe 18 is arranged at one end of the outer shell 2, an exhaust pipe 13 is arranged at the other end of the outer shell 2, the air inlet pipe 18 and the exhaust pipe 13 are communicated with the inside of the inner shell 1, a front partition plate 4 is arranged in the inside of the inner shell 1, the front partition plate 4 is arranged close to the air inlet pipe 18, a first silencing chamber 3 is formed between the front partition plate 4 and the inner shell 1, and noise is concentrated in the first silencing chamber 3;

The middle position of the front baffle plate 4 is provided with a first communicating pipe 6, one side of the front baffle plate 4 is provided with two porous plates 9, a plurality of sound-absorbing holes are uniformly distributed on the porous plates 9, gaps are reserved among the porous plates 9 and are filled with silencing materials to form a series silencing module 10, the silencing materials can be silencing cotton, the porous plates 9 are provided with two second communicating pipes 8, the front baffle plate 4, the porous plates 9 and the inner shell 1 form a second silencing chamber 7, the first communicating pipe 6 and the second communicating pipe 8 are positioned in the second silencing chamber 7, noise enters the second silencing chamber 7 through the first communicating pipe 6, a part of noise is rubbed and converted into heat energy in the holes on the porous plates 9 to consume, so that sound waves are weakened, and the other part of noise is shunted into the second communicating pipe 8 and is dispersed, impedance, reflected and filtered along a curved surface, so that the noise is greatly reduced;

One side of the porous plate 9 is provided with a rear baffle plate 12, an exhaust pipe 13 is fixed at the middle position of the rear baffle plate 12, a gap is reserved between the rear baffle plate 12 and the inner shell 1 and is filled with a silencing material, a third silencing chamber 11 is formed among the porous plate 9, the rear baffle plate 12 and the inner shell 1, noise is concentrated in the third silencing chamber 11, and the noise is absorbed by the silencing material, so that the noise is weakened in three modes, and the silencing performance is greatly improved.

In order to prevent heat diffusion, a heat insulating material 5 is filled between the inner case 1 and the outer case 2.

In order to facilitate the connection of the air inlet pipe 18 and the air outlet pipe 13 with the pipeline, an air inlet flange 17 and an air outlet flange 14 are respectively arranged on the air inlet pipe 18 and the air outlet pipe 13.

In order to improve the connection stability of the first communication pipe 6, the second communication pipe 8 and the exhaust pipe 13, the front partition plate 4 is connected with the first communication pipe 6, the porous plate 9, the second communication pipe 8, the rear partition plate 12 and the exhaust pipe 13 in a welding mode.

In order to facilitate performance test of the silencer, two brackets 15 are symmetrically arranged at the lower end of the shell 2, and a fixing plate 16 is arranged at the lower end of each bracket 15, so that the silencer can be fixed on a wall surface or the ground when the silencing performance is tested.

In addition, the number of the second communication pipes 8 on the perforated plate 9 may be adjusted according to actual demands such as the noise reduction effect and the resistance requirement.

Noise discharged by the engine sequentially passes through the first silencing chamber 3, the second silencing chamber 7 and the third silencing chamber 11, and sound waves are rubbed in the holes of the porous plate 9 to be converted into heat energy to be dissipated, so that the sound waves are weakened; meanwhile, the structure of the silencer can change the direction of the air flow for a plurality of times, reduce the passing section of the air flow, then enlarge the section, divide the air flow into a plurality of small branches, and disperse, impedance, reflect and filter along the curved surface so as to greatly reduce noise; after the exhaust enters the muffler, a part of sound energy is consumed in the multi-stage propagation process, a part of sound energy is consumed in the multi-reflection process in a mismatched manner by Cheng Zukang, a part of sound energy is absorbed by the silencing material, and finally, only a very small part of noise is discharged into the atmosphere.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides an exhaust silencer, includes inner shell (1) and shell (2), the one end of shell (2) is provided with intake pipe (18), the other end of shell (2) is provided with blast pipe (13), intake pipe (18) and blast pipe (13) all are linked together its characterized in that with inner shell (1) inside: a front baffle plate (4) is arranged in the inner shell (1), the front baffle plate (4) is arranged close to the air inlet pipe (18), and a first silencing chamber (3) is formed between the front baffle plate (4) and the inner shell (1);

the middle position of the front partition plate (4) is provided with a first communicating pipe (6), one side of the front partition plate (4) is provided with at least two porous plates (9), gaps are reserved among the porous plates (9) and are filled with silencing materials to form a silencing module (10) connected in series, the porous plates (9) are provided with at least two second communicating pipes (8), the front partition plate (4), the porous plates (9) and the inner shell (1) form a second silencing chamber (7), and the first communicating pipe (6) and the second communicating pipe (8) are both positioned in the second silencing chamber (7);

one side of the porous plate (9) is provided with a rear partition plate (12), the exhaust pipe (13) is fixed at the middle position of the rear partition plate (12), a gap is reserved between the rear partition plate (12) and the inner shell (1) and filled with a silencing material, and a third silencing chamber (11) is formed among the porous plate (9), the rear partition plate (12) and the inner shell (1).

2. An exhaust silencer as claimed in claim 1, wherein: and a heat insulation material (5) is filled between the inner shell (1) and the outer shell (2).

3. An exhaust silencer as claimed in claim 1, wherein: an air inlet flange (17) and an air outlet flange (14) are respectively arranged on the air inlet pipe (18) and the air outlet pipe (13).

4. An exhaust silencer as claimed in claim 1, wherein: the front partition plate (4) is connected with the first communicating pipe (6), the porous plate (9) is connected with the second communicating pipe (8), the rear partition plate (12) and the exhaust pipe (13) in a welding mode.

5. An exhaust silencer as claimed in claim 1, wherein: two brackets (15) are symmetrically arranged at the lower end of the shell (2), and a fixing plate (16) is arranged at the lower end of each bracket (15).